Shaving-machine for curved plates



(No Model.) I I G. ELLLOYD. SHAVING MACHINE FOR CURVED PLATES. N0. 367,987.

Patented Aug. 9, 1887.

WITNESSES. .@M

:4. Farms, rum-mommy. Wilhlliinn. n. a

UNITED STATES PATENT OFFICE.

GEORGE E. LLOYD, OF CHICAGO, ILLINOIS.

SHAVING-MACHINE FOR CURVED PLATES.

SPECIFICATION forming part of Letters Patent No. 367,987fdated August 9, 1887.

Application filcd April 22, 1887. Serial No. 225,753. (No model.)

to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Heretofore it has been customary when shaving the backs of circular plates, such as are used in revolving type-cylinder presses, to

place them in a stationary concave bed, and then'by means of a revolving knife, the periphery described by which corresponds to the concavity of the back of said plate and in register therewith, shave the same.

The object of my invention is to reverse this order, believing, as I do, that the operation is more satisfactory and positive in its results,

and make the bed revolve around the station- Besides this, I am enabled by such.

ary knife. construction to trim the end edges of the plate at the same time it is being shaved bymeans which withthe old construction it is very difficult to do.

In the drawings, Figure 1 is a perspective Fig. 2 is a transverse view of my invention. vertical section of the same at about its center of length. Fig. 3 is a'transverse vertical section near the right-hand end of the machine, as shown in Fig. 1, looking into the bed thereof. Fig. 4. is a transverse vertical section thereof near the left-hand end of the same, looking into the bed.

Reference being had to the drawings, A represents a rectangular frame resting upon and supported by four legs, 1'. t

B 13 represent two clrcular bearing-frames, provided with laterally-projecting lugs which rest upon and are secured to the upper flanged edges of the sides of frame A, and O represents an inverted-V frame having secured in its vertex the longitudinal stationary knifecarrying shaft b.

The bed D has its bearings in the bearingframes B B, and revolves around the knife E.

'It could be made perfectly cylindrical; but I prefer to make it as shown-via, the half in which the plate is placed semicircular and the other half cut away, except at its ends, which are left intact, so as to furnish a perfectly circular journal within the bearing-frames B. These bearing-frames are located sufficiently far apart so that the end edges of the bed D are flush with the outer edges thereof.

Mounted on shaft 'b, so that the projecting part thereof, to which knife E is adj ustably secured, may be between the end edges of the bed, is the knife-frame c. Shaft 1) extends slightly beyond the boss of knife-frame c, and rests within the bore of the bossof the wheelframe d, which serves alike as a support for the adjacent end of shaft 1) and at the same time as a brace for that end of the bed in which it is inserted.

The back of the knifeframe c is curved like an evolute, while its inner surface, to which the knife is secured and is adjustable radially to andfrom the work, is flat.

Secured by bolts or otherwise to the circular.edgcs of the end of the bed farthest from the V frame, in which shaft 1) is secured, is a worm-gear, F. This worm-gear meshes with and is driven by a worm, G, on the transverse driving-shaft g, suitably journaled in the sides of frame A. On the outer end of this shaft 9 is a loose pulley, e, which is driven, through the medium of a belt, by the main shaft. As it would not do to have the bed revolving all the'time, it is necessary to so control its actuating 'n1echanismto wit, the driving-shaft that when the bed D has revolved sufficiently to shave the plate and is in position for the shaved plate to be removed and another inserted it can be stopped or started up at will. This I accomplish by serrating the inner edges of the F, which, by means of a spline on said shaft,

- can move longitudinally, but not revolve in dependently of the shaft. This clutch is thrown in andout of engagementwith the pulley by means of the bifurcated arm f, projecting from the contiguous end of the transverse-reciproeating rod h, the bifurcated arms of which turn inwardly toward the shaft 9 into the ciren m fercntial groove in said clutch F, as shown. Projecting vertically from the boss of arm f is a pin, which passes through the contiguous end of a hand-lever, I, which is fulcrumed near ICO Y said end to a lug projecting laterally from frame A, and pursues a longitudinal course toward the opposite end of the machine, where it can be easily manipulated by the operator.

I utilize rod h to automatically stop the bed when the work is shaved and in position to be removed. The position the bed should be in when this is the case is substantially that shown in Fig. 1. \Vhen the bed is in this position, I secure at a point intersected by a vertical line passing through the center of shaft 1), to the inneredge of the circularcnd or journal of the bed, a plate, 71 from which an '1 f1 nger, 7., projects downward so that its vertical portion is on the same vertical plane assaid rod 71. Journaled on a stud projecting laterally from a point on the inner edge of the adjacent bearing-frame B, intersected by a vertical line passing through the center of shaft b, is a spring-actuated tumbler, m. The upper arm of this tumbler is struck by the finger I; once during each revolution as the bed approaches the position shown in said Fig. 1, and the horizontal arm of said tumbler is thereby oscillated from behind a shoulder made in the upper portion of -a boss, K, fast on the rod h. The moment this red is released, by reason of the tumbler being acted upon by the finger 7a, a coil-expansion spring surrounding the rod 71, between said boss K and frame A, pushes the rod to the right side of the machine, and thus by reason of the bifurcated arm f disengages the clutch F from the drive-pulley.

In order that the momentum acquired by the shaft 9 when in operation may not affect it when the clutch F is withdrawn from engagement with the drive pulley, I slightly bevel the end edges of said clutch near'est frame A and provide a circular depression in the bearings of the drive-shaft in the contiguous side of the frame A and obversely bevel the inner side walls thereof. \Vhen clutch F is withdrawn from engagement with the drivepulley,it enters said depression in the bearings of the shaft, and coming in contact with the beveled surfaces thereof forms a frictional contact, which immediately brakes the shaft.

In order to keep the plate which is to be shaved in the position shown in dotted lines in Fig. 2, I provide the longitudinal ledges m and y. These ledges may be cast in one piece with the bed; but I prefer to make one-say m divided at its center of length, so that by adj usting bolt :6 vertically (when the bed is in position shown in Fig. 1) I secure the plate better and make it fit more snugly the curvature of the bed. To accomplish this I secure bolt :0 to a laterally-projecting arm, 0, which moves in a recess in the edge of bed, as shown. Passing vertically upward from this arm 12 through the flange of the contiguous edge of bed D is a screw, 1, which on being turned raises or lowers said bolt 0:, so as to lock the plate in position or release it therefrom, as desired.

In order to trim the edges of the plate as its back or concave surface is being shaved, I journal in lugs 1' r, projecting down from the circular bearing-frames B, as illustrated, the trimmer-shaft M. This shaft M has a rotary cutter, a, which is of such radius and so lo cated with reference to the plate that it trims off the edges projecting beyond the edges of the bed. This shaft M is driven through the medium of apulley placed on its opposite end, which projects beyond the end of frame A, as Shown.

The operation of my invention is simple. The bed being in the position shown in Fig. 1, the plate to be shaved is pushed in from the nigh end of the machine, so that its side edges rest on the ledges m 7 Ledge w is then so adj usted as to securely hold the plate in position. Lever I is then grasped and oscillated toward the machine, thus throwing the clutch into engagement with the drive-pulley and imparting motion to the rest of machine. \Vhen lever I is manipulated so as to throw the clutch into engagement with the drivepulley, the rod h is pulled toward said pulley, and the tumbler m, snapping down behind the boss K, maintains said rod in such position until the bed has revolved and assumed such position that finger It strikes said tumbler, releases said spring-actuated rod, and withdraws the clutch from engagement with the drive-pulley. Thus the bed having completed a revolution and carried the work under the knife in such manner as to shave it, the work is removed and the machine is ready for a fresh supply.

The details of my invention as hereinbefore described need not be strictly adhered to when beingconstructed, for it is evident that various changes could easily be conceived of by expert workmen which would perform the function of the parts they were substituted for, but would not change the principles which actuated me when constructing. All such modifications I wish to be understood as claiming.

hat I claim as new is 1. In a circular-plateshaving machine, the combination, with a stationary knife, of a circular bed provided with means for holding the plate and having a revolving motion around said knife.

2. In a circular-plateshaving machine, the combination, with a circular bed capable of securely holding the plate, of a trimmer or cutter, a, and shaft M, so located with reference to said bed that as the latter revolves the edges of the plate projecting beyond the adjacent edges of said bed are trimmed.

3. In a circular-plate-shaving machine, the combination, with a knife, E, of bed D, re volving in suitable bearings, worm-gear F, worm O, pulley c, and clutch F, as and for the purpose set forth.

4. In a circular-plate-shaving machine, the combination, with knife E, knife-frame c, and stationary shaft 11, secured in the vertex of a A frame at one end and its other end resting in the bore of a wheel-frame, d, of the bed I) and. wheel-frame d, and means, as described, for operating said bed.

5. In a circnlanplatc'shaving machine, the

combination, with a stationary knife, of a bed,

D, having ledges wand 3 said ledge 00 having arm 0, which moves in a recess in the adjacent edge of said bed, and screw t, as set forth.

6. In a eircular-plate-shaving machine, the combination, with the bed D, frames B, in which the same revolves, worm-gear F, worm O, shaft 9, pulley e, and clutch F, of bifurcated arm h and lever I, as described.

7. In a eireular-plate-shaving machine, the combination, with bed D, frames 13, in which the same revolves, gear F, worm'O, shaft pulley e, and clutch F, engaging therewith, of arm f,rod h, boss and expansion-spring thereon, tumbler m, and finger k, secured, respectively, I 5 to frame B and the journal-piece of bed D, as and for the purpose set forth.

In testimony that I claim the foregoing as my own I hereunto affix my signature in presence of two witnesses. I I

GEORGE E. LLOYD. WVitnesses:

FRANK D. THOMASON, ROBERT J. CoYNE. 

